题目内容

梯形图与传统的继电器控制电路图的主要区别是什么？

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某软件公司欲开发一个图像处理系统，在项目初期开发人员对需求并不确定的情况下，采用（）方法比较合适。

A. 瀑布式
B. 快速原型
C. 协同开发
D. 形式化

Many of the activities performed during the preliminary investigation are still being conducted in（1）,but in much greater depth than before. During this phase, the analyst must become fully aware of the（2）and must develop enough knowledge about the（3）and the existing systems to enable an effective solution to be proposed and implemented. Besides the（4）for process and data of current system, the deliverable from this phase also includes the（5）for the proposed system.

A. hardware and software specification
B. system performance specification
C. formal requirements definition
D. general problem statement

Many of the activities performed during the preliminary investigation are still being conducted in（1）,but in much greater depth than before. During this phase, the analyst must become fully aware of the（2）and must develop enough knowledge about the（3）and the existing systems to enable an effective solution to be proposed and implemented. Besides the（4）for process and data of current system, the deliverable from this phase also includes the（5）for the proposed system.

A. logical models
B. physical models
C. design models
D. implementation models

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